Derry Water Quality
New Hampshire
The tap water in Derry, New Hampshire is served by 17 EPA-regulated water systems covering approximately 18,748 people. 44 health-based violations are on record, most recently for 8000 in 2024. Data source: EPA Safe Drinking Water Information System.
Drinking water in Derry, New Hampshire is delivered through 17 EPA-regulated community water systems serving an estimated 18,748 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Derry shows 44 total violations across all 17 systems, of which 44 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 8000, 1040, 5000, 1005, 2950 and 1 others. 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the New Hampshire drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| DERRY WATER DEPT | 17,210 | 0 | Clean |
| ACKERMAN RETIREMENT PARK | 350 | 3 | Health |
| RAND SHEPARD HILL | 158 | 0 | Clean |
| CENTENNIAL ESTATES | 140 | 3 | Health |
| BRANCH RIVER APARTMENTS | 120 | 0 | Clean |
| STANYAN ROAD | 113 | 1 | Health |
| CANDIA CROSSING | 80 | 0 | Clean |
| BARKLAND ACRES | 80 | 15 | Health |
| MORNINGSIDE DRIVE | 80 | 2 | Health |
| AUTUMN WOODS | 73 | 0 | Clean |
| FOREST GLEN CONDOS | 70 | 0 | Clean |
| WILLOW BEND | 57 | 0 | Clean |
| OLD COACH VILLAGE | 50 | 5 | Health |
| RUNNING BROOK | 47 | 0 | Clean |
| WILDER VILLAGE CLUSTER | 45 | 1 | Health |
| SHADY LANE APARTMENTS | 42 | 2 | Health |
| CAMELOT III | 33 | 12 | Health |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 8000 | 2024-08-01 |
| 1040 | 2023-07-01 |
| 1040 | 2023-07-01 |
| 1040 | 2023-07-01 |
| 5000 | 2020-10-08 |
| 1005 | 2018-10-01 |
| 1005 | 2018-07-01 |
| 1005 | 2018-04-01 |
| 2950 | 2018-01-01 |
| 1005 | 2018-01-01 |
| 2950 | 2017-07-01 |
| 1005 | 2017-07-01 |
| 1005 | 2017-07-01 |
| 1005 | 2017-04-01 |
| 1005 | 2017-04-01 |
| 1005 | 2017-01-01 |
| 1005 | 2017-01-01 |
| 8000 | 2016-11-01 |
| 1005 | 2016-10-01 |
| 1005 | 2016-10-01 |
| 1005 | 2016-07-01 |
| 1005 | 2016-07-01 |
| 1005 | 2016-04-01 |
| 1005 | 2016-04-01 |
| 1005 | 2016-01-01 |
| 1005 | 2016-01-01 |
| 1005 | 2015-10-01 |
| 1005 | 2015-10-01 |
| 0700 | 2015-08-01 |
| 1005 | 2015-07-01 |
| 1005 | 2015-07-01 |
| 0700 | 2015-06-07 |
| 1005 | 2015-04-01 |
| 0700 | 2015-04-01 |
| 1005 | 2015-04-01 |
| 1005 | 2015-01-01 |
| 1005 | 2014-10-01 |
| 1005 | 2014-07-01 |
| 1005 | 2014-04-01 |
| 1005 | 2014-01-01 |
| 0700 | 2013-11-27 |
| 0700 | 2013-03-10 |
| 0700 | 2010-10-04 |
| 5000 | 1994-01-01 |
TRI Facilities in Derry
| Facility | Total Releases |
|---|---|
| Fireye Inc | 1 lbs |
Frequently Asked Questions
Is Derry, New Hampshire water safe to drink? ▼
How many water violations does Derry have? ▼
What contaminants were found in Derry water? ▼
How many water systems serve Derry? ▼
Where does Derry get its drinking water? ▼
Are there pollution sources near Derry? ▼
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.